mirror of
https://github.com/libretro/scummvm.git
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109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef MADE_REDREADER_H
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#define MADE_REDREADER_H
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#include "common/scummsys.h"
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namespace Common {
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class SeekableReadStream;
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class File;
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}
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namespace Made {
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class RedReader {
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public:
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Common::SeekableReadStream *load(const char *redFilename, const char *filename);
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static Common::SeekableReadStream *loadFromRed(const char *redFilename, const char *filename);
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private:
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struct FileEntry {
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uint32 compSize, origSize;
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};
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bool seekFile(Common::File &fd, FileEntry &fileEntry, const char *filename);
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};
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const uint BITBUFSIZ = 16;
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const uint DICBIT = 13;
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const uint DICSIZ = 1 << DICBIT;
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const uint MATCHBIT = 8;
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const uint MAXMATCH = 256;
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const uint THRESHOLD = 3;
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const uint NC = 255 + MAXMATCH + 2 - THRESHOLD;
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const uint CBIT = 9;
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const uint CODE_BIT = 16;
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const uint NP = DICBIT + 1;
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const int NT = CODE_BIT + 3;
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const uint PBIT = 4;
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const uint TBIT = 5;
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const uint NPT = NT;
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class LzhDecompressor {
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public:
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LzhDecompressor();
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~LzhDecompressor();
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int decompress(Common::SeekableReadStream &source, byte *dest, uint32 compSize, uint32 origSize);
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private:
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Common::SeekableReadStream *_source;
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uint32 _compSize, _blockPos;
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uint16 _bitbuf;
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uint _subbitbuf;
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int _bitcount;
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uint16 _left[2 * NC - 1], _right[2 * NC - 1];
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byte _c_len[NC], _pt_len[NPT];
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uint _blocksize;
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uint16 _c_table[4096], _pt_table[256];
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int tree_n, heapsize;
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short heap[NC + 1];
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uint16 *freq, *sortptr, len_cnt[17];
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byte *len_table;
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int decode_i, decode_j;
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int count_len_depth;
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byte readByte();
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void fillbuf(int count);
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uint getbits(int count);
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void init_getbits();
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void decode_start();
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void decode(uint count, byte text[]);
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void huf_decode_start();
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unsigned int decode_c();
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unsigned int decode_p();
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void read_pt_len(int nn, int nbit, int i_special);
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void read_c_len();
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void count_len(int i);
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void make_len(int root);
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void downheap(int i);
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void make_code(int n, byte len[], uint16 code[]);
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void make_table(uint nchar, byte bitlen[], uint tablebits, uint16 table[]);
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int make_tree(int nparm, uint16 freqparm[], byte lenparm[], uint16 codeparm[]);
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};
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} // End of namespace Made
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#endif /* MADE_H */
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